Datasets:
25. μ’ννλ©΄μμ λ μ§μ | |
\[ | |
\frac{x+1}{2} = y - 3, \quad x - 2 = \frac{y - 5}{3} | |
\] | |
κ° μ΄λ£¨λ μκ°μ ν¬κΈ°λ₯Ό $\theta$λΌ ν λ, $\cos \theta$μ κ°μ? [3μ ] | |
\begin{itemize} | |
\item[1] $\frac{1}{2}$ | |
\item[2] $\frac{\sqrt{5}}{4}$ | |
\item[3] $\frac{\sqrt{6}}{4}$ | |
\item[4] $\frac{\sqrt{7}}{4}$ | |
\item[5] $\frac{\sqrt{2}}{2}$ | |
\end{itemize} |